Magnesium is one of the most important cations for an organism. The aim of our study is to evaluate whether the use of a magnesium formulation as a diet supplement or medical treatment is necessary. The 24-hour recall method was used to obtain information regarding the daily magnesium consumption of 949 people. The results were compared with the Estimated Average Requirement (EAR) and Recommended Daily Allowance (RDA) values. The average daily requirement for magnesium was exceeded by 292 (183 women and 109 men) of the 949 respondents. This research confirmed excessive magnesium intake by both men and women that exceeded both the EAR and the RDA. Uncontrolled, excessive dietary supplementation or medical treatment with magnesium by this group may constitute a health threat.